Excessive movement of 5th wheel pin box as a result of cracked frame supporting it. This is the only point of attachment between the tow vehicle and the trailer. Complete failure could lead to uncontrolled detachment of trailer resulting in serious damage, injury or death. Grand Design inspected range of motion of the rear of the pin box on Feb 9, 2025 and deemed it not an issue. However, the front attachment point has a complete crack through the supporting beam which they will not address.